Coffee maker



FIG. 1 is a front elevational view of a coffee maker showing my new design;

FIG. 2 is a right front perspective view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a coffee maker, as shown and described. 